Regardless of what form symptoms take (SKIN RASH, tingling around the MOUTH, DIARRHEA), a type I hypersensitivity reaction is a systemic response-it affects and involves the body as a whole.
How to Read Your Eyeglass Prescription. The first step to understanding your eyeglass prescription is knowing what OD and OS mean. They are abbreviations for oculus dexter and oculus sinister, which are Latin terms for right eye and left eye.
Optometrist carries the letter OD (doctor of optometry). They are the first of the ocular team to consult to when you have problems with your eyes. They are licensed and trained to examine, diagnose and treat specific eye conditions and ocular abnormalities.